A few studies employed ferrets as animal models for SARS‐1 infection challenges;[96, 97, 244] however, these models are partially resistant to SARS‐2 infection.[245, 246] For example, while ferrets are susceptible to infection, they require high SARS‐2 dose (105.5 PFU) to enable quantification of viral RNA titers, and to exhibit histopathological symptoms, pneumonia, and lung lesions.[246] Viral RNA titers peak 2–6 days post‐infection, then viral clearance occurs by day 14 post‐infection. This evidence concerns the gene SARS2 and infection.